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<div class="title">ICMP.cpp</div>  </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/*</span></div><div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment">  Created by Fabrizio Di Vittorio (fdivitto2013@gmail.com) - &lt;http://www.fabgl.com&gt;</span></div><div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment">  Copyright (c) 2019-2020 Fabrizio Di Vittorio.</span></div><div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment">  All rights reserved.</span></div><div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment">  This file is part of FabGL Library.</span></div><div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment">  FabGL is free software: you can redistribute it and/or modify</span></div><div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment">  it under the terms of the GNU General Public License as published by</span></div><div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment">  the Free Software Foundation, either version 3 of the License, or</span></div><div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment">  (at your option) any later version.</span></div><div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment">  FabGL is distributed in the hope that it will be useful,</span></div><div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="comment">  but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div><div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment">  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</span></div><div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="comment">  GNU General Public License for more details.</span></div><div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="comment">  You should have received a copy of the GNU General Public License</span></div><div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="comment">  along with FabGL.  If not, see &lt;http://www.gnu.org/licenses/&gt;.</span></div><div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;</div><div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;</div><div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="preprocessor">#ifdef ARDUINO</span></div><div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;</div><div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;</div><div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="_i_c_m_p_8h.html">ICMP.h</a>&quot;</span></div><div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;</div><div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="preprocessor">#include &quot;Arduino.h&quot;</span></div><div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="preprocessor">#include &quot;WiFiGeneric.h&quot;</span></div><div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;</div><div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;</div><div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespacefabgl.html">fabgl</a> {</div><div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;</div><div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;</div><div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;ICMP::ICMP()</div><div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;  : m_queue(xQueueCreate(1, sizeof(uint8_t))), m_waitingID(rand() &amp; 0xFFFF), m_waitingSeq(-1)</div><div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;{</div><div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;}</div><div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;</div><div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;</div><div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;ICMP::~ICMP()</div><div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;{</div><div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;  vQueueDelete(m_queue);</div><div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;}</div><div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;</div><div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;</div><div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;<span class="comment">// -1 = timeout</span></div><div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;<span class="comment">// -2 = cannot resolve name</span></div><div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;<span class="keywordtype">int</span> ICMP::ping(<span class="keywordtype">char</span> <span class="keyword">const</span> * host)</div><div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;{</div><div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;  IPAddress hostIP((uint32_t)0);</div><div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;  <span class="keywordflow">if</span> (!WiFiGenericClass::hostByName(host, hostIP))</div><div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;    <span class="keywordflow">return</span> -2;</div><div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;  <span class="keywordflow">return</span> ping(hostIP);</div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;}</div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;</div><div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;</div><div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;<span class="comment">// -1 = timeout</span></div><div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;<span class="keywordtype">int</span> ICMP::ping(IPAddress <span class="keyword">const</span> &amp;dest)</div><div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;{</div><div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;  <span class="keyword">static</span> int32_t <span class="keyword">const</span> TIMEOUT        = 1000;</div><div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;  <span class="keyword">static</span> int32_t <span class="keyword">const</span> TIMEOUT_RESULT = -1;</div><div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;</div><div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;  m_destIP = dest;</div><div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;</div><div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;  <span class="keywordtype">int</span> result = TIMEOUT_RESULT;</div><div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;</div><div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;  <span class="comment">// generate seq</span></div><div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;  ++m_waitingSeq;</div><div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;</div><div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;  <span class="comment">// prepare packet to send</span></div><div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;  pbuf * hdrbuf = pbuf_alloc(PBUF_IP, <span class="keyword">sizeof</span>(icmp_echo_hdr), PBUF_RAM);</div><div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;  icmp_echo_hdr * hdr = (icmp_echo_hdr *) hdrbuf-&gt;payload;</div><div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;  hdr-&gt;type   = ICMP_ECHO;</div><div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;  hdr-&gt;code   = 0;</div><div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;  hdr-&gt;chksum = 0;</div><div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;  hdr-&gt;id     = htons(m_waitingID);</div><div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;  hdr-&gt;seqno  = htons(m_waitingSeq);</div><div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;  hdr-&gt;chksum = inet_chksum((uint16_t *) hdr, <span class="keyword">sizeof</span>(icmp_echo_hdr));</div><div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;</div><div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;  <span class="comment">// send Echo request</span></div><div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;  raw_pcb * pcb = raw_new(IP_PROTO_ICMP);</div><div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;  raw_recv(pcb, ICMP::raw_recv_fn, <span class="keyword">this</span>);</div><div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;  raw_bind(pcb, IP_ADDR_ANY);</div><div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;</div><div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;  ip_addr_t addr;</div><div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;  addr.type = IPADDR_TYPE_V4;</div><div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;  addr.u_addr.ip4.addr = dest;</div><div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;  raw_sendto(pcb, hdrbuf, &amp;addr);</div><div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;  pbuf_free(hdrbuf);</div><div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;</div><div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;  result = -1;</div><div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;  int32_t t1 = micros();</div><div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;  uint8_t c;</div><div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;  <span class="keywordflow">if</span> (xQueueReceive(m_queue, &amp;c, pdMS_TO_TICKS(TIMEOUT)))</div><div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;    result = micros() - t1;</div><div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;  raw_remove(pcb);</div><div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;</div><div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;  <span class="keywordflow">return</span> result;</div><div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;}</div><div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;</div><div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;</div><div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;uint8_t ICMP::raw_recv_fn(<span class="keywordtype">void</span> * arg, raw_pcb * pcb, pbuf * p, <span class="keyword">const</span> ip_addr_t * addr)</div><div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;{</div><div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;  ICMP * this_ = (ICMP *)arg;</div><div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;</div><div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;  ip_hdr * iphdr = (ip_hdr *)p-&gt;payload;</div><div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;</div><div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;  <span class="keywordtype">int</span> ttl = IPH_TTL(iphdr);</div><div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;</div><div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;  <span class="keywordflow">if</span> (p-&gt;tot_len &gt;= <span class="keyword">sizeof</span>(ip_hdr) + <span class="keyword">sizeof</span>(icmp_echo_hdr) &amp;&amp; pbuf_header(p, -(s16_t)<span class="keyword">sizeof</span>(ip_hdr)) == 0) {</div><div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;    icmp_echo_hdr * hdr = (icmp_echo_hdr *) p-&gt;payload;</div><div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;    if (ntohs(hdr-&gt;id) == this_-&gt;m_waitingID &amp;&amp; ntohs(hdr-&gt;seqno) == this_-&gt;m_waitingSeq) {</div><div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;      this_-&gt;m_receivedBytes = p-&gt;tot_len;</div><div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;      this_-&gt;m_receivedTTL = ttl;</div><div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;      uint8_t c = 0;</div><div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;      xQueueSendToBack(this_-&gt;m_queue, &amp;c, portMAX_DELAY);</div><div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;    }</div><div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;    pbuf_free(p);</div><div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;    <span class="keywordflow">return</span> 1;</div><div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;  }</div><div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;</div><div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;}</div><div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;</div><div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;</div><div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;</div><div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;}</div><div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;</div><div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;</div><div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;</div><div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;<span class="preprocessor">#endif // #ifdef ARDUINO</span></div><div class="ttc" id="_i_c_m_p_8h_html"><div class="ttname"><a href="_i_c_m_p_8h.html">ICMP.h</a></div><div class="ttdoc">This file contains ICMP (ping) class. </div></div>
<div class="ttc" id="namespacefabgl_html"><div class="ttname"><a href="namespacefabgl.html">fabgl</a></div><div class="ttdef"><b>Definition:</b> <a href="canvas_8cpp_source.html#l00031">canvas.cpp:31</a></div></div>
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